Machine for finishing glassware



(No Model.)

W. H. BARR. MACHINE FOR FINISHING GLASSWARE.

No. 530,820. Patented 1360.11, 1894.

wifnesa zs UNITED STATES PATENT OFFICE...

WILLIAM H. BARR, OF TIFFIN, OHIO.

MACHINE FOR FINISHING GLASSWAR E.

SPECIFICATION forming part of Letters Patent No. 530,820, dated December 1 1, 1894.

Application filed September 26, 1 894. Serial No. 524,168. (No model.)

To all whom it may concern:

Be it known that I, WILLIAM H. BARR,a citizen of the United States, residing at Tiffin, in the county of Seneca and State of Ohio, have invented a new and useful Improvement in Machines for Finishing Glassware, of which the following is a specification.

In an application for a patent for finishing glassware, filed by me June 11, 1894:, Serial No. 514,222, I have shown and described the machine as adapted for use with a plug and a cup, as the working tools for forming and polishing the inner and outer walls of tumblers, and wherein the article is mechanically rotated within and upon the walls of the cup.

} My present improvement in this machine is designed for use with the plug and over and upon which the article is placed and rotated mechanically to finish its inner wall, while its outer wall is finished by hand labor during the rotation of the article upon the plug, whereby the walls of thearticle are made smooth and trueand the article restored to its perfect shape.

In finishing molded glass-ware the article is taken from the mold by the punty and its edge reheated in the glory-holefurnace to reduce the roughness and the fin left on the edge from the mold and to give a smooth rounded edge. This reheating distorts the article and its walls are more or less rough as it comes from the mold which also leaves joint fins or seams on the outer wall of the article and it is for polishing and making the walls smooth and to restore the article to its perfect shape and in a quick and economical way that my present improved machine is intended. In this work it will be understood that the article, carried by the punty, is placed upon the plug which rests upon the machine in position to support the punty while knocking it off. The plug with the article, is then shifted to a'position in which the article is connected or clamped to a rotating disk or chuck and thereby rotated upon the walls of the plug to form and to polish its inner walls, the same plug being used in both steps of the operation on the .same table and both the inner and the outer walls of the article are polished and formed atthe same time while it is being rotated upon the plug.

The accompanying drawings show this improved machine, in which I Figure 1 represents the complete machine in sectional elevation and the article in the position it occupies while being rotated upon the plug'by the disk; and Fig. 2 shows enlarged the plug and the disk-chuck for clamping and rotating the article upon the plug.

' A skeleton frame erected upon the table has crossbars 1, 1 formed with vertically coincident guides which may be siinple notches 2,2 within which the punty stem 3 is placed and held in the operation of centering the article 4 carried thereby, with the plug 5, which is first placed upon the table in central alignment with the guides, as shown by dotted lines in Fig. I. In this position the article is slid down upon the plug and a slight,

tap by a rod upon the punty knocks the latter off leaving the article upon the plug. The plug is then removed by its handle 6 tea position upon the table centrally beneath a rotating disk 7 having provision for connecting" it with the bottom of'the article to rotate the same upon the Walls of the plug; The disk is suspended for vertical movement to'effect and to release its connection with the bottom of the article on the plug and the disk is rotated by its connectionwith a vertical shaft 8 -upon which it has a vertical sliding move ment. This shaft is mounted in suitable brackets 9 of the verticaltframe and r0 tated by a friction disk 10, engaging a friction-wheel 11, the shaft 12 of which hasa power driven pulley 13. The disk which connects and rotatesthe article is suspended by p I the shaft 8 and the latteris suspen'dedby the friction disk which is supported by the friction wheel. The chuck-disk is carried upon the lower end of a sleeve 14 which is connected to the shaft by a slot 15 and pin 16 which permits the vertical movement of the chuck-disk and causes the shaft to drive-it.

I prefer to provide the ordinary chuck-jaws 17 as a'means for clamping the end of the article to rotate it upon. the plug and the jaws are opened and closed by a right and left screw 18 shown in Fig. 2. The surfaceof the disk however maybe rasped and as the bottom of the article is more or less rough as it comes from the mold the rasped surface of the disk will thereby take sufficient hold upon the article to rotate it in frictional contact with the plug. A hand lever 19 is pivoted to the frame and connected to the sleeve to raise and lower it in the operation of placing the plug having the article, and of connecting the plug with it. I prefer to use a positive clamping device for rotating the article because the lever can then be used for giving the article a slight vertical movement while at the same time it is being positively rotated upon the polishing surface of the plug. In this operation the plug is prevented from turning with the article by a stop 20 on the table against which the plug-handle rests as an abutment, the plug being centered in alignment with the axis of the chuck-disk by a pin 21 in the table or otherwise.

The plug is preferably of iron and is in form the counterpart of the article to be finished upon it. Its surface is completely coated with a polishing substance of groundcork dried upon a coating of linseed-oil and shoemakers wax to give it a polishing action upon the inner wall of the article and to perfectly form it. There must be no contact with the article of the iron as the latter would leave black marks or streaks and to prevent such contact the plug is recoated from time to time. The plug is kept cool by immersing it in water every time it is used, for, if allowed to become hot, the article, which is in a malleable condition, would stick to the plug.

It will be understood that different sizes and forms of plugs and chuck-disks may be used to suit different articles to be finished, such as tumblers, celery-holders, finger-bowls, salad-dishes and handled and footed ware.

The driving power is adapted to give a comparatively slow rotation to the articleabout one hundred and ten revolutions per minute, so that while the article is being automatically polished and formed on its inner wall it is at the same time polished and formed on its outer wall by the rubbing and pressing action of a block held in the hands of a workman and having its rubbing surface conforming to the shape of the article. The block I prefer to make of cherry-wood and it is kept cool by dipping it in Water. It is handled quickly and can be moved in every direction over the surface of the article and around the handle. During the operation the article rests by its weight, supplemented by that of the chuck-disk and its suspending sleeve upon the plug and thereby gives the article the required pressure upon the walls of the plug to give the perfect form and polish.

It will be understood that the driving power is controlled by a suitable clutch to start and to stop the chuck-disk and applying and removing the article. Only a few revolutions are sufficient to give the finish and form to the article, when it is removed from the plug and taken to the tempering oven.

In this finishing machine I use a single plug which serves as the means of holding the article while knocking otf the purity, forming and polishing the inner wall of the article and of supporting it while being polished and formed on its outer wall by a hand operated block.

I claim as my invention A machine for finishing glass-ware comprising a table, a guide-frame erected thereou,a vertical shaft in said guide frame having a sleevedisk, a lever pivoted to said frame and connecting said sleeve and a removable finishing plug held from turning and in alignment with the axis of the chuck-disk for operation in rotating and finishing the article in the way described.

WILLIAM H. BARR.

Witnesses:

W. F. NOBLE, CHAS. DEPPEN. 

